EMAE 160 Midterm Review - Fasteners,
Cleaning, and Coating Exam Questions
and Answers
What is the rule of thumb for maximum engagement in a threaded hole? - ANSWER-
1.5 of diameter
What is the purpose of a lock washer? What are some other methods of
accomplishing this purpose? - ANSWER-Lock washers prevent nuts from moving,
this could also be done with nylon inserts
What are the benefits of cleaning with an alkaline or solvent? - ANSWER-Clean,
consistent finish
What metal requires passivation? - ANSWER-Stainless steel
What are the terms for the degradation of ferrous and non-ferrous metals? -
ANSWER-Rust and corrosion respectively
What is the function of tumble de-burring? - ANSWER-Tumble and deburring
services can remove jagged edges or protrusions from metal parts. Deburring
equipment such as machinery is to accomplish the process of deburring. Primarily
two types of deburring machines are used - tumbling or barrel machines and
vibratory machines. Tumblers are used for mass finishing of parts. They can be used
for wet as well as dry finishing. These systems are well suited for fast and efficient
deburring of metal parts or components and are used where heavy deburring is
required. Barrels are ideal for heavy loads. Dry tumbling is used when delicate
deburring is called for and produces a smooth finish. Wet barreling is used for metal
processing to remove excess material as well as to provide a polish
What is the purpose of a flat washer? - ANSWER-To distribute the pressure of the
nut/bolt evenly over the part being secured, reducing the chance of damage, and to
provide a smooth surface for the nut/bolt to bear on, making it less likely to loosen as
a result of an uneven fastening surface.
Why are metals coated?
a. Provide corrosion protection
b. Provide a specified color
c. Prepare the surface for subsequent processing
d. All of the above - ANSWER-d. All of the above
List several reasons why manufactured parts must be cleaned? . - ANSWER-
Hygienic, removal of contaminants, prep for further processing, aesthetic
Cleaning, and Coating Exam Questions
and Answers
What is the rule of thumb for maximum engagement in a threaded hole? - ANSWER-
1.5 of diameter
What is the purpose of a lock washer? What are some other methods of
accomplishing this purpose? - ANSWER-Lock washers prevent nuts from moving,
this could also be done with nylon inserts
What are the benefits of cleaning with an alkaline or solvent? - ANSWER-Clean,
consistent finish
What metal requires passivation? - ANSWER-Stainless steel
What are the terms for the degradation of ferrous and non-ferrous metals? -
ANSWER-Rust and corrosion respectively
What is the function of tumble de-burring? - ANSWER-Tumble and deburring
services can remove jagged edges or protrusions from metal parts. Deburring
equipment such as machinery is to accomplish the process of deburring. Primarily
two types of deburring machines are used - tumbling or barrel machines and
vibratory machines. Tumblers are used for mass finishing of parts. They can be used
for wet as well as dry finishing. These systems are well suited for fast and efficient
deburring of metal parts or components and are used where heavy deburring is
required. Barrels are ideal for heavy loads. Dry tumbling is used when delicate
deburring is called for and produces a smooth finish. Wet barreling is used for metal
processing to remove excess material as well as to provide a polish
What is the purpose of a flat washer? - ANSWER-To distribute the pressure of the
nut/bolt evenly over the part being secured, reducing the chance of damage, and to
provide a smooth surface for the nut/bolt to bear on, making it less likely to loosen as
a result of an uneven fastening surface.
Why are metals coated?
a. Provide corrosion protection
b. Provide a specified color
c. Prepare the surface for subsequent processing
d. All of the above - ANSWER-d. All of the above
List several reasons why manufactured parts must be cleaned? . - ANSWER-
Hygienic, removal of contaminants, prep for further processing, aesthetic
